Improveivjent in steam-pumps



J. McCORMACKa KELLY.

'STEAM-PUMP. N0,1'7o,oos, patented Nw. 16,1875.v

NTPETERS. PNOTO-LITHOGHAFHER, WASHINGTON. D. (J4

Artnr Y BALTIMORE, MARYLAND.

IMPROVEMENT IN STEAM-PUMPS.

Specification forming part of Letters Patent No. 170,008., dated Novemberlf'l; app,licati,on` ledi i l September 18, 1&75.

To all whom it may @www Be it known that we, JAMES McGoRMAoK, of Greenield, in the county of Highland and State of Ohio, and SYLVEsrER R. KELLY, of the city of Baltimore, in the county of Baltimore and State of Maryland, have invented certain Improvements in Steam-Pumps, of which the followingis a specication:

The object of this invention is to provide a steam-pump of simple and cheap construction, and one in which all liability of choking or clogging will be avoided.

The invention consists in a novel combina tion of a balanced-pendulum outlet-valve with the suitably-arranged ports and passages of the pump-barrel, whereby the said valve is actuated to insure the outllow of Water from opposite sides of the pump-piston by means of the pressure of the water itself, independ ent of any positive actuating mechanism.

The invention further comprises a novel combination of a check-valve with the afore` said pendulum-valve and the ports and passages connected therewith, Wherebythe interposition of any obstacle to the free movement of the pendulum-valve is prevented from causing any return ow or regurgitation ofthe water through the inlet-port of the pump-bar rel.

Figure 1 is a central vertical longitudinal sectional View of a pump made according to our invention. Fig. 2 isa transverse vertical section of the same, taken in the line :z: of Fig. l. Y

A is the steam-cylinder, and B the pumpbarrel, placed in the same axial line, and connected by the same frame-work,'in the usual or in any suitable manner, C being the piston ofthe steam-cylinder, and D the pump-piston, the two being united by the usual piston-rod E, passing through stuffing-boxes a, as in steampumps of ordinary construction. F is the slide-valve of the steam-cylinder, b being the steam-chest, and c the valve-seat. The

ports and passagesV of the valve and cylinder (shown at a b cin Fig. 1) are suitably arranged for the inlet and exhaust of the steam, and may be of the precise arrangement show n in the figure aforesaid, or of any other known to be efficient in the working of an engine slidevalve, and therefore require nolextendeddescription here. y between the interiorof the latterfand that of valve-chest, and one at each` endof. said .cyl-y inder and'valvechest, are slotsor openings g, which, however,- are closedat their upper ends by the hat under surface of the valve. In these slots are pivoted actuating-levers G. (The pivots shownatfi.) The-uppeneX-tremi'- ties of these levers are rounded tohtinto sockets r, of corresponding form, in theunder surface of the valve, at thetwoiends thereof.

The lower extremities` of these actuating-lel or opposite stroke.

It will be seen that by this means a simple, strong, and effective system of working the valve is secured, and that the parts being wholly inclosed by the cylinder and valvechest, all injury thereto, either by accidental violence, or from dust, dirt, grit, &c., is effectually guarded against.

The upper part'ot the pump-barrel B is en larged to provide room for the valve-chamber f, the form of which is shown at Fig. 1, and in which is placed the pendulum-valve I, pivoted at a point below -its center in such wise that its upper arm m shall be longer than its lower arm a, the said valve being pivoted as indicated at a, either by pins, pivots, projections formed upon it and-iitted into fixed bearings, or by any other appropriate means. At the top of the valve-chamber is the outlet-port t, the said valve-chamber communicating with the ends of 'the pnmp-barrel-by means of the passages u. The inlet-port w enters the bottom of the aforesaid chamber, and connects with the inlet pipe or passage K, and with the passages u by other passages e, as inFig. l.A Between the pipe K and inlet-port w is a check-valve, N, the purpose of which Will presently herein appear.

In thesidetof thecylinder,

In the operation of the apparatus the moveward or inward to the pump-barrel, it affords nient ot' the steam-piston, hereinbefore explained, being, of course, communicated to the pump-piston, the stroke ot' the latter, for eX- alnple, in the direction indicated by the arrow in Fig. l, draws the Water in through the inletadjacent 'passage e, and'loWer part of "adjacent passage u into the barrel-behind the piston. Simultaneous with this the stroke of the piston forces the Water through the passage u adjacent against the upper part of the pendulum-valve I, and this being longer than the lower part of said valve, and therefore possessed of greater leverage, is swung back tothe opposite side ofthe valve-chamber, and thereby reverses the relations of the inlet and outlet ports'to the opposite sides of the pumppiston,'opening the inlet-port to permit'the just-explained -iiow of Water behind said piston, and opening the outlet-port to permit the outflow therethrough of the Water in front of the piston. On the reverse movement of the pump-piston the pendulum-valve is again, in the same manner, reversed to permit the tilling ofthe cylinder behind the piston, and the expulsion of its contents in front thereof, this operation of the valve being entirely and automatically performed by the pressure of the -Water upon the said pendulum-valve, the press- 'ure upon the one arm thereof, owing to the unequal length of said arms, exceeding that upon the other.

Inasmuch as the cheek-valve N opens upno hinderance to the inflow of thepvvater to the said barrel;` but if for any reason the piston, the Whole force of the latter is applied to press the Water against the pendulum-piston until the same be moved or operated to permit and insure the normal operation of the pump. A

What We claim as our invention is- 1. The pendulum-valve I, constructed with one arm longer than the other, in combination With the inlet and outlet ports lw t and passages u e, the whole arranged in connection with the pump-barrel B, substantially as and for the purpose set forth.

2. The ycheck-valve N, arranged in relation with the inlet-port W, pendulum-valve I, and passages u e of the pump-barrel, substantially as and for the purpose set forth.

' JAS. MCCORMACK.

SYLVESTER R. KELLY. Witnesses to KELLY: A

JAMES A. WHITNEY, ELBERT DEARBORN. Witnesses to MCCORMACK:

B. D. SCOTT, BOWEN DUNHAM. 

